prevent action bar title from being overwritten

src/main/java/com/owncloud/android/ui/fragment/OCFileListFragment.java

@@ -1443,6 +1443,7 @@ public class OCFileListFragment extends ExtendedListFragment implements
         remoteOperationAsyncTask = new AsyncTask() {
             @Override
             protected Object doInBackground(Object[] params) {
+                setTitle();
                 if (getContext() != null && !isCancelled()) {
                     RemoteOperationResult remoteOperationResult = remoteOperation.execute(currentAccount, getContext());